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A digital density equalization technique to improve visualization of breast periphery in mammography
A P Stefanoyiannis1, L Costaridou, P Sakellaropoulos
1Department of Medical Physics, School of Medicine, University of Patras, Greece.
The British Journal of Radiology
|June 9, 2000
Summary
A new digital technique improves mammogram image quality by equalizing density at the breast periphery. This method enhances contrast in overexposed regions, aiding in clearer diagnostic imaging.
Area of Science:
- Medical Imaging
- Digital Image Processing
Background:
- Mammographic imaging often suffers from overexposure at the breast periphery.
- This overexposure leads to high optical density and reduced contrast, potentially obscuring diagnostic details.
Purpose of the Study:
- To develop a digital, model-driven density equalization technique for mammography.
- To address the issue of overexposed breast periphery in mammographic images.
Main Methods:
- A novel technique incorporating thresholding for breast region segmentation and wavelet-based fusion for selective periphery equalization was designed.
- The method accounts for the non-linear characteristic curve of the film-digitizer system.
Main Results:
- Initial applications produced density-equalized mammographic images.
- The technique successfully improved contrast specifically at the breast periphery.
Conclusions:
- The developed digital density equalization technique effectively overcomes overexposure issues in mammography.
- This method offers enhanced contrast at the breast periphery, improving diagnostic image quality.